2.6.32-stable review patch. If anyone has any objections, please let us know.

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From: Bob Copeland <me@bobcopeland.com>

commit b6855772f4a22c4fbdd4fcaceff5c8a527035123 upstream.

ath5k assumes ah_current_channel is always a valid pointer inseveral places, but a newly created interface may not have achannel. To avoid null pointer dereferences, set it up to pointto the first available channel until later reconfigured.